(57) A screen printing method comprises an aligning process for fixing a master plate
(10) to a fixing frame (20) in aligned relation thereto, an exposure process of exposing
a screen printing plate (50) through the master plate (10) fixed to the fixing frame
(20), a developing process for developing the thus exposed screen printing plate (50),
and a printing process for printing a workpiece (80) by using the thus developed screen
printing plate (50). In the aligning process, the positioning pins (22a, 22b, 22c)
of the fixing frame (20) abut against the positioning protuberances (62a, 62b, 62c)
of a fixing block (61). In the exposure process, the positioning pins (22a, 22b, 22c)
of the fixing frame (20) abut against the positioning protuberances (32a, 32b, 32c)
of a positioning block (3), while the positioning pins (52a, 52b, 52c) of the printing
plate (51) holding the screen printing plate (50) abut against the positioning protuberances
(62a, 62b, 62c) of the fixing block (61). In the printing process, the positioning
pins (52a, 52b, 52c) of the plate frame (51) holding the screen printing plate (50)
abut against the positioning protuberances (72a, 72b, 72c) of a fixing block (71).
With this arrangement, the aligned state established by the aligning process which
is performed first of all is maintained throughout until the last printing process
is completed.
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